21708120

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:665

約数の個数: 128

約数和(自身を含む): 76285440

約数和(自身を除く): 54577320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 43, 56, 60, 70, 84, 86, 105, 120, 129, 140, 168, 172, 210, 215, 258, 280, 301, 344, 420, 430, 516, 601, 602, 645, 840, 860, 903, 1032, 1202, 1204, 1290, 1505, 1720, 1803, 1806, 2404, 2408, 2580, 3005, 3010, 3606, 3612, 4207, 4515, 4808, 5160, 6010, 6020, 7212, 7224, 8414, 9015, 9030, 12020, 12040, 12621, 14424, 16828, 18030, 18060, 21035, 24040, 25242, 25843, 33656, 36060, 36120, 42070, 50484, 51686, 63105, 72120, 77529, 84140, 100968, 103372, 126210, 129215, 155058, 168280, 180901, 206744, 252420, 258430, 310116, 361802, 387645, 504840, 516860, 542703, 620232, 723604, 775290, 904505, 1033720, 1085406, 1447208, 1550580, 1809010, 2170812, 2713515, 3101160, 3618020, 4341624, 5427030, 7236040, 10854060, 21708120]

約数ペア:

[(1, 21708120), (2, 10854060), (3, 7236040), (4, 5427030), (5, 4341624), (6, 3618020), (7, 3101160), (8, 2713515), (10, 2170812), (12, 1809010), (14, 1550580), (15, 1447208), (20, 1085406), (21, 1033720), (24, 904505), (28, 775290), (30, 723604), (35, 620232), (40, 542703), (42, 516860), (43, 504840), (56, 387645), (60, 361802), (70, 310116), (84, 258430), (86, 252420), (105, 206744), (120, 180901), (129, 168280), (140, 155058), (168, 129215), (172, 126210), (210, 103372), (215, 100968), (258, 84140), (280, 77529), (301, 72120), (344, 63105), (420, 51686), (430, 50484), (516, 42070), (601, 36120), (602, 36060), (645, 33656), (840, 25843), (860, 25242), (903, 24040), (1032, 21035), (1202, 18060), (1204, 18030), (1290, 16828), (1505, 14424), (1720, 12621), (1803, 12040), (1806, 12020), (2404, 9030), (2408, 9015), (2580, 8414), (3005, 7224), (3010, 7212), (3606, 6020), (3612, 6010), (4207, 5160), (4515, 4808)]